Tempe, AZ Outdoor Lighting: Dark Sky Rules (2026)

Tempe's outdoor lighting standards are found in the Zoning and Development Code's development standards section. The city requires full-cutoff or shielded fixtures for many commercial and multi-family applications to reduce light pollution, glare, and light trespass. Upward-directed decorative lighting is restricted. Parking lot lighting must meet maximum illumination levels and uniformity ratios. New development and redevelopment projects must submit a photometric plan during plan review showing compliance with lighting standards. Residential exterior lighting is subject to light trespass provisions, meaning your outdoor lights should not unreasonably illuminate your neighbor's property. Arizona has a strong dark sky advocacy tradition, with the International Dark-Sky Association headquartered in Tucson. While Tempe is too urban for serious astronomical observation, the lighting standards help manage the urban glow and protect neighboring communities. LED conversion of street lighting has been implemented with appropriate color temperature and shielding.